package com.netty.tcp;


import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

import java.nio.charset.Charset;
import java.util.UUID;

public class My_ServerHander extends SimpleChannelInboundHandler<ByteBuf> {
    private int count;

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.channel().close();
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {
        byte[] bytes = new byte[msg.readableBytes()];
        msg.readBytes(bytes);
        ////将buffer转成字符串
        String message = new String(bytes, Charset.forName("utf-8"));
        System.out.println("接收到的消息是 : "+message);
        System.out.println("接收到消息的总量是 : " +(++this.count));

        //服务器回送数据给客户端, 回送一个随机id ,
        ByteBuf responseByteBuf = Unpooled.copiedBuffer(UUID.randomUUID().toString() + " ", Charset.forName("utf-8"));
        ctx.writeAndFlush(responseByteBuf);
    }
}
